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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Routing\Loader;
use Symfony\Component\Config\Loader\FileLoader;
use Symfony\Component\Config\Resource\FileResource;
use Symfony\Component\Config\Util\XmlUtils;
use Symfony\Component\Routing\Loader\Configurator\Traits\HostTrait;
use Symfony\Component\Routing\Loader\Configurator\Traits\LocalizedRouteTrait;
use Symfony\Component\Routing\Loader\Configurator\Traits\PrefixTrait;
use Symfony\Component\Routing\RouteCollection;
/**
* XmlFileLoader loads XML routing files.
*
* @author Fabien Potencier <fabien@symfony.com>
* @author Tobias Schultze <http://tobion.de>
*/
class XmlFileLoader extends FileLoader
{
use HostTrait;
use LocalizedRouteTrait;
use PrefixTrait;
public const NAMESPACE_URI = 'http://symfony.com/schema/routing';
public const SCHEME_PATH = '/schema/routing/routing-1.0.xsd';
/**
* Loads an XML file.
*
* @param string $file An XML file path
* @param string|null $type The resource type
*
* @return RouteCollection A RouteCollection instance
*
* @throws \InvalidArgumentException when the file cannot be loaded or when the XML cannot be
* parsed because it does not validate against the scheme
*/
public function load($file, string $type = null)
{
$path = $this->locator->locate($file);
$xml = $this->loadFile($path);
$collection = new RouteCollection();
$collection->addResource(new FileResource($path));
// process routes and imports
foreach ($xml->documentElement->childNodes as $node) {
if (!$node instanceof \DOMElement) {
continue;
}
$this->parseNode($collection, $node, $path, $file);
}
return $collection;
}
/**
* Parses a node from a loaded XML file.
*
* @param \DOMElement $node Element to parse
* @param string $path Full path of the XML file being processed
* @param string $file Loaded file name
*
* @throws \InvalidArgumentException When the XML is invalid
*/
protected function parseNode(RouteCollection $collection, \DOMElement $node, string $path, string $file)
{
if (self::NAMESPACE_URI !== $node->namespaceURI) {
return;
}
switch ($node->localName) {
case 'route':
$this->parseRoute($collection, $node, $path);
break;
case 'import':
$this->parseImport($collection, $node, $path, $file);
break;
default:
throw new \InvalidArgumentException(sprintf('Unknown tag "%s" used in file "%s". Expected "route" or "import".', $node->localName, $path));
}
}
/**
* {@inheritdoc}
*/
public function supports($resource, string $type = null)
{
return \is_string($resource) && 'xml' === pathinfo($resource, \PATHINFO_EXTENSION) && (!$type || 'xml' === $type);
}
/**
* Parses a route and adds it to the RouteCollection.
*
* @param \DOMElement $node Element to parse that represents a Route
* @param string $path Full path of the XML file being processed
*
* @throws \InvalidArgumentException When the XML is invalid
*/
protected function parseRoute(RouteCollection $collection, \DOMElement $node, string $path)
{
if ('' === $id = $node->getAttribute('id')) {
throw new \InvalidArgumentException(sprintf('The <route> element in file "%s" must have an "id" attribute.', $path));
}
$schemes = preg_split('/[\s,\|]++/', $node->getAttribute('schemes'), -1, \PREG_SPLIT_NO_EMPTY);
$methods = preg_split('/[\s,\|]++/', $node->getAttribute('methods'), -1, \PREG_SPLIT_NO_EMPTY);
[$defaults, $requirements, $options, $condition, $paths, /* $prefixes */, $hosts] = $this->parseConfigs($node, $path);
if (!$paths && '' === $node->getAttribute('path')) {
throw new \InvalidArgumentException(sprintf('The <route> element in file "%s" must have a "path" attribute or <path> child nodes.', $path));
}
if ($paths && '' !== $node->getAttribute('path')) {
throw new \InvalidArgumentException(sprintf('The <route> element in file "%s" must not have both a "path" attribute and <path> child nodes.', $path));
}
$routes = $this->createLocalizedRoute($collection, $id, $paths ?: $node->getAttribute('path'));
$routes->addDefaults($defaults);
$routes->addRequirements($requirements);
$routes->addOptions($options);
$routes->setSchemes($schemes);
$routes->setMethods($methods);
$routes->setCondition($condition);
if (null !== $hosts) {
$this->addHost($routes, $hosts);
}
}
/**
* Parses an import and adds the routes in the resource to the RouteCollection.
*
* @param \DOMElement $node Element to parse that represents a Route
* @param string $path Full path of the XML file being processed
* @param string $file Loaded file name
*
* @throws \InvalidArgumentException When the XML is invalid
*/
protected function parseImport(RouteCollection $collection, \DOMElement $node, string $path, string $file)
{
if ('' === $resource = $node->getAttribute('resource')) {
throw new \InvalidArgumentException(sprintf('The <import> element in file "%s" must have a "resource" attribute.', $path));
}
$type = $node->getAttribute('type');
$prefix = $node->getAttribute('prefix');
$schemes = $node->hasAttribute('schemes') ? preg_split('/[\s,\|]++/', $node->getAttribute('schemes'), -1, \PREG_SPLIT_NO_EMPTY) : null;
$methods = $node->hasAttribute('methods') ? preg_split('/[\s,\|]++/', $node->getAttribute('methods'), -1, \PREG_SPLIT_NO_EMPTY) : null;
$trailingSlashOnRoot = $node->hasAttribute('trailing-slash-on-root') ? XmlUtils::phpize($node->getAttribute('trailing-slash-on-root')) : true;
$namePrefix = $node->getAttribute('name-prefix') ?: null;
[$defaults, $requirements, $options, $condition, /* $paths */, $prefixes, $hosts] = $this->parseConfigs($node, $path);
if ('' !== $prefix && $prefixes) {
throw new \InvalidArgumentException(sprintf('The <route> element in file "%s" must not have both a "prefix" attribute and <prefix> child nodes.', $path));
}
$exclude = [];
foreach ($node->childNodes as $child) {
if ($child instanceof \DOMElement && $child->localName === $exclude && self::NAMESPACE_URI === $child->namespaceURI) {
$exclude[] = $child->nodeValue;
}
}
if ($node->hasAttribute('exclude')) {
if ($exclude) {
throw new \InvalidArgumentException('You cannot use both the attribute "exclude" and <exclude> tags at the same time.');
}
$exclude = [$node->getAttribute('exclude')];
}
$this->setCurrentDir(\dirname($path));
/** @var RouteCollection[] $imported */
$imported = $this->import($resource, ('' !== $type ? $type : null), false, $file, $exclude) ?: [];
if (!\is_array($imported)) {
$imported = [$imported];
}
foreach ($imported as $subCollection) {
$this->addPrefix($subCollection, $prefixes ?: $prefix, $trailingSlashOnRoot);
if (null !== $hosts) {
$this->addHost($subCollection, $hosts);
}
if (null !== $condition) {
$subCollection->setCondition($condition);
}
if (null !== $schemes) {
$subCollection->setSchemes($schemes);
}
if (null !== $methods) {
$subCollection->setMethods($methods);
}
if (null !== $namePrefix) {
$subCollection->addNamePrefix($namePrefix);
}
$subCollection->addDefaults($defaults);
$subCollection->addRequirements($requirements);
$subCollection->addOptions($options);
$collection->addCollection($subCollection);
}
}
/**
* Loads an XML file.
*
* @param string $file An XML file path
*
* @return \DOMDocument
*
* @throws \InvalidArgumentException When loading of XML file fails because of syntax errors
* or when the XML structure is not as expected by the scheme -
* see validate()
*/
protected function loadFile(string $file)
{
return XmlUtils::loadFile($file, __DIR__.static::SCHEME_PATH);
}
/**
* Parses the config elements (default, requirement, option).
*
* @throws \InvalidArgumentException When the XML is invalid
*/
private function parseConfigs(\DOMElement $node, string $path): array
{
$defaults = [];
$requirements = [];
$options = [];
$condition = null;
$prefixes = [];
$paths = [];
$hosts = [];
/** @var \DOMElement $n */
foreach ($node->getElementsByTagNameNS(self::NAMESPACE_URI, '*') as $n) {
if ($node !== $n->parentNode) {
continue;
}
switch ($n->localName) {
case 'path':
$paths[$n->getAttribute('locale')] = trim($n->textContent);
break;
case 'host':
$hosts[$n->getAttribute('locale')] = trim($n->textContent);
break;
case 'prefix':
$prefixes[$n->getAttribute('locale')] = trim($n->textContent);
break;
case 'default':
if ($this->isElementValueNull($n)) {
$defaults[$n->getAttribute('key')] = null;
} else {
$defaults[$n->getAttribute('key')] = $this->parseDefaultsConfig($n, $path);
}
break;
case 'requirement':
$requirements[$n->getAttribute('key')] = trim($n->textContent);
break;
case 'option':
$options[$n->getAttribute('key')] = XmlUtils::phpize(trim($n->textContent));
break;
case 'condition':
$condition = trim($n->textContent);
break;
default:
throw new \InvalidArgumentException(sprintf('Unknown tag "%s" used in file "%s". Expected "default", "requirement", "option" or "condition".', $n->localName, $path));
}
}
if ($controller = $node->getAttribute('controller')) {
if (isset($defaults['_controller'])) {
$name = $node->hasAttribute('id') ? sprintf('"%s".', $node->getAttribute('id')) : sprintf('the "%s" tag.', $node->tagName);
throw new \InvalidArgumentException(sprintf('The routing file "%s" must not specify both the "controller" attribute and the defaults key "_controller" for ', $path).$name);
}
$defaults['_controller'] = $controller;
}
if ($node->hasAttribute('locale')) {
$defaults['_locale'] = $node->getAttribute('locale');
}
if ($node->hasAttribute('format')) {
$defaults['_format'] = $node->getAttribute('format');
}
if ($node->hasAttribute('utf8')) {
$options['utf8'] = XmlUtils::phpize($node->getAttribute('utf8'));
}
if ($stateless = $node->getAttribute('stateless')) {
if (isset($defaults['_stateless'])) {
$name = $node->hasAttribute('id') ? sprintf('"%s".', $node->getAttribute('id')) : sprintf('the "%s" tag.', $node->tagName);
throw new \InvalidArgumentException(sprintf('The routing file "%s" must not specify both the "stateless" attribute and the defaults key "_stateless" for ', $path).$name);
}
$defaults['_stateless'] = XmlUtils::phpize($stateless);
}
if (!$hosts) {
$hosts = $node->hasAttribute('host') ? $node->getAttribute('host') : null;
}
return [$defaults, $requirements, $options, $condition, $paths, $prefixes, $hosts];
}
/**
* Parses the "default" elements.
*
* @return array|bool|float|int|string|null The parsed value of the "default" element
*/
private function parseDefaultsConfig(\DOMElement $element, string $path)
{
if ($this->isElementValueNull($element)) {
return null;
}
// Check for existing element nodes in the default element. There can
// only be a single element inside a default element. So this element
// (if one was found) can safely be returned.
foreach ($element->childNodes as $child) {
if (!$child instanceof \DOMElement) {
continue;
}
if (self::NAMESPACE_URI !== $child->namespaceURI) {
continue;
}
return $this->parseDefaultNode($child, $path);
}
// If the default element doesn't contain a nested "bool", "int", "float",
// "string", "list", or "map" element, the element contents will be treated
// as the string value of the associated default option.
return trim($element->textContent);
}
/**
* Recursively parses the value of a "default" element.
*
* @return array|bool|float|int|string|null The parsed value
*
* @throws \InvalidArgumentException when the XML is invalid
*/
private function parseDefaultNode(\DOMElement $node, string $path)
{
if ($this->isElementValueNull($node)) {
return null;
}
switch ($node->localName) {
case 'bool':
return 'true' === trim($node->nodeValue) || '1' === trim($node->nodeValue);
case 'int':
return (int) trim($node->nodeValue);
case 'float':
return (float) trim($node->nodeValue);
case 'string':
return trim($node->nodeValue);
case 'list':
$list = [];
foreach ($node->childNodes as $element) {
if (!$element instanceof \DOMElement) {
continue;
}
if (self::NAMESPACE_URI !== $element->namespaceURI) {
continue;
}
$list[] = $this->parseDefaultNode($element, $path);
}
return $list;
case 'map':
$map = [];
foreach ($node->childNodes as $element) {
if (!$element instanceof \DOMElement) {
continue;
}
if (self::NAMESPACE_URI !== $element->namespaceURI) {
continue;
}
$map[$element->getAttribute('key')] = $this->parseDefaultNode($element, $path);
}
return $map;
default:
throw new \InvalidArgumentException(sprintf('Unknown tag "%s" used in file "%s". Expected "bool", "int", "float", "string", "list", or "map".', $node->localName, $path));
}
}
private function isElementValueNull(\DOMElement $element): bool
{
$namespaceUri = 'http://www.w3.org/2001/XMLSchema-instance';
if (!$element->hasAttributeNS($namespaceUri, 'nil')) {
return false;
}
return 'true' === $element->getAttributeNS($namespaceUri, 'nil') || '1' === $element->getAttributeNS($namespaceUri, 'nil');
}
}